Q. Ocean acidification, a consequence of increased atmospheric CO2, disrupts coral reef ecosystems. Which one of the following aspects of coral life is primarily affected by ocean acidification?
Explanation – Ocean acidification occurs when excess atmospheric CO2 dissolves in seawater, leading to a decrease in pH levels. This change in water chemistry affects the ability of corals to build their calcium carbonate skeletons, which are essential for their structure and support. As acidification increases, the availability of carbonate ions (which corals use to build their skeletons) decreases, hindering the corals’ ability to grow and maintain their skeletons. Consequently, the overall growth rate of corals is negatively impacted, and the reef ecosystem’s ability to keep up with natural erosion and disturbances is diminished. While other aspects, such as reproduction, feeding behavior, and immune response, may also be affected by ocean acidification indirectly, the primary impact is on the growth rate of coral skeletons.
Source: The Hindu
